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3/5 of a number is 162. Work out the number.

270
AP
Answered by Aasav P. • Maths tutor
3093 Views

A circle has equation x^{2}-8x+y^{2}-6y=d. A line is tangent to this circle and passes through points A and B, (0,17) and (17,0) respectively. Find the radius of the circle.

Gradient of line: (0-17)/(17-0)= -1 equation of line: y-y 1 =m(x-x 1 ) y-17=-1(x-0) y=17-x equation of circle: (x-4) 2 +(y-3) 2 -25=d (completing the square) (x-4) 2 +(y-3) 2 =d+25 Substitute equation of lin...
AH
2873 Views

Conjugate the verb Jugar for each person in preterite form

JuguéJugasteJugóJugamosJugasteisJugaron
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Answered by Armand D. • Spanish tutor
1678 Views

Explain how carbon monoxide is produced when petrol is burned in car engines. (2 marks)

Car petrol is usually some form of alkane, which has the general formula C n H 2n+2 . Let us assume we are using Butane (C 4 H 10 ). The desired chemical reaction for the complete combustion of butane is 2C ...
LB
Answered by Luc B. • Chemistry tutor
14606 Views

A person swims from a depth of 0.50 m to a depth of 1.70 m below the surface of the sea. Density of the sea water = 1030 kg/m^3. Gravitational field strength = 9.8 N/kg. Calculate the increase in pressure on the swimmer. Give the unit.

We may use from the equation sheet, that p = h ρ g. Here, we are looking for a change in pressure, so one or more of the terms on the other side of the equation must be changing too. The question tells us th...
LB
Answered by Luc B. • Physics tutor
5715 Views